Merge pull request #407 from sugarjig/patch-1

Added "How to be a Programmer" under Professional Development

free-programming-books.md

@@ -377,7 +377,7 @@
 ####Professional Development
 * [Don't Just Roll the Dice](http://download.red-gate.com/ebooks/DJRTD_eBook.pdf) (PDF) *(RedGate, By Neil Davidson)*
 * [Confessions of an IT Manager](http://download.red-gate.com/ebooks/DotNet/Confessions_IT_Manager.zip) *(RedGate, By Phil Factor)*
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+* [How to be a Programmer: A Short, Comprehensive, and Personal Summary] (http://samizdat.mines.edu/howto/HowToBeAProgrammer.html) by Robert L. Read
 
 ####Cryptography
 * [Handbook of Applied Cryptography](http://cacr.uwaterloo.ca/hac/index.html)